Specie descritta (24):
- Algansea barbata Alvarez & Cortés, 1964 (Algansea), valid
- Algansea paratincella Alvarez, 1959, synonym
- Allotoca regalis Allotoca regalis, 1959 (Allotoca), valid
- Archomenidia bolivari Álvarez & Carranza, 1952, synonym
- Xenatherina schultzi Álvarez & Carranza, 1952 (Atherinella), valid
- Chapalichthys pardalis Álvarez, 1963 (Chapalichthys), valid
- Chapalichthys peraticus Álvarez, 1963, synonym
- Chirostoma melanoccus Álvarez, 1963 (Chirostoma), valid
- Cichlasoma cajali Alvarez & Gutierrez, 1953, synonym
- Cyprinodon beltrani Álvarez, 1949 (Cyprinodon), valid
- Dicerophallus echeagarayi Alvarez, 1952 (Heterophallus), valid
- Hyporhamphus mexicanus Álvarez, 1959 (Hyporhamphus), valid
- Notropis celayensis Álvarez, 1958, synonym
- Poblana letholepis Álvarez, 1950 (Poblana), subspecies
- Poblana alchichica squamata Álvarez, 1950 (Poblana), subspecies
- Poblana hidalgoi Álvarez, 1953, synonym
- Mollienesia sulphuraria Alvarez, 1948 (Poecilia), valid
- Priapella compressa Alvarez, 1948 (Priapella), valid
- Priapella intermedia Alvarez & Carranza, 1982 (Priapella), valid
- Rivulus hendrichsi Alvarez & Carranza, 1952, synonym
- Notropis ipni Alvarez & Navarro, 1953 (Tampichthys), valid
- Tetrapleurodon geminis Álvarez, 1964 (Tetrapleurodon), valid
- Tlaloc mexicanus Alvarez & Carranza, 1951, synonym
- Xiphophorus clemenciae Alvarez, 1959 (Xiphophorus), valid